Again I ask Itunes will no longer burn a playable cd for cars why???????

Question

I need to burn my CDs and several songs from the itunes store to a CD that plays on my 2005 Hyundai Santa Fe. The previous itunes libraries 7-8 I have had since I have had this car and their burnt CDs worked fine. However now if I burn in this version 9 nothing plays. I Import CDs with 20-30 tracks that on previous systems a full burn could take place and no quality lost. Now these burns in the new system do not work.
Now before you ask me if it was set to Audio Yes it was and I also set it to 2X speed. My Car is supposed to be able to read MP3 CDs and used to read those from my Itunes library but now not anymore.
Also I have reset it to audio and found that at 2x speed I can get a CD to burn up to 5 songs a disc that will read but come on we know something must be wrong, we should be able to double that amount.
Before you ask did you make sure the speed is adjusted to a low speed, let me tell you this, I have been fooling with the settings trying to solve this problem and have wasted CDs and found that of every available speed, 16X was what worked best prior to Itunes 9 and now after wasting CDs and checking settings as I experimented, 2X is the only one to show me any playable music and only 5 songs, I want to be able to burn more than that.
So I have been adjusting the settings constantly and have determined that if it was set to audio and 2x I get a 5 song disc, however if I try to burn more the entire CD is wasted because it becomes unplayable. I have also tried this with every available CD-R which is the only burnable my car is able to play. Everything from Memorex to Sony and PNY and the same results happen still.
I have also tried this in Toast Titanium and in there not one CD burns at all. I am beginning to wonder is it really Itunes that is the problem or is it a problem that has happened due to a update file that was in the Mac OSX update for superdrive.
I checked with my dealership and they told me that windows burned CDs still work perfectly which they even demonstrated in my car, however when we looked at a CD burned from the one apple computer at the dealership, it too would not read. Thus it leaves us to wonder, what is going on here.
Can anyone give me a valid explanation or an actual mac genius please trouble shoot this for me? I need an answer that is better than another question. Please read through this before asking anything please help thx

Answer 1

Okay, can someone please give a useful answer? Thanks! I have been experiencing exactly the same problem for some time now, and it is very annoying. Furthermore, I would like to point out to Chris CA that there is absolutely nothing ambiguous about the original post.
So here is the deal. I used to be able to burn CDs with iTunes that played back fine on both my car and home stereo. After some update, and I am very sorry but I really do not remember which one, as I am just a user and not a programmer and just want something that works, which in the end Apple used to be all about, and therefore do not keep track of all the updates, CDs won't play back on my car stereo. Nothing else changed, still the same brand of CDs (even the same stack!), still the same car stereo, and still the same 2007 MBP. So by simple deduction I conclude it must be a software update. And I do not care what the exact cause is, I just want a fix!
I'd like to apologize for my tone in the above, but it is just a very annoying problem, even more so because it seems nothing is being done about it. Thanks for your answer in advance!